be fed up with - be out of patience with
　　be on one’s own - live independently
　　be on the safe side - take no chances
　　be out of something - have no longer in supply
　　be tired of - be bored with ,frustrated with
　　be up to ones’ears - be extremely busy
　　be up to someone -be a person’s responsibility
　　be out for -trying to get
　　be out of the question - be unacceptable ,impossible
　　bite off ...[查看详情]